Need Building Help!

Can anyone tell me if there is a script or an in world object available in making blueprint textures? I can make the blueprints just fine using Photoshop, but when it comes to putting them to use in SL, that's where I'm having problems.
I need to make the texture able to spread out over multiple prims so I may use them to build actual size buildings.
I know I've seen something similar somewhere on SL. Just can't find it again.

Thanks in advance.